centre of gravity of line

vin300

what is the centre of gravity of an arc(as opposed to sector) and that of the periphery of triangle(not the area of the triangle)? I'm supposed to use it for calculating blank diameter before drawing and for calculating centre of pressure during blanking.

mfb

You can evaluate those shapes with the usual integral for the center of gravity (should be easy to find in any textbook, wikipedia or other web pages). For the triangle, it is easier: Calculate the position for each side, and calculate the weighted average (with mass as weight) of them afterwards.

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vin300	centre of gravity of line Tweet what is the centre of gravity of an arc(as opposed to sector) and that of the periphery of triangle(not the area of the triangle)? I'm supposed to use it for calculating blank diameter before drawing and for calculating centre of pressure during blanking.

mfb Mentor	You can evaluate those shapes with the usual integral for the center of gravity (should be easy to find in any textbook, wikipedia or other web pages). For the triangle, it is easier: Calculate the position for each side, and calculate the weighted average (with mass as weight) of them afterwards.